Air conditioner, its mute control method and computer-readable storage medium

Abstract

The present invention discloses an air conditioner, a mute control method thereof and a computer-readable storage medium. The method includes: in response to a compressor stop signal, controlling the first throttling device to remain in an open state; controlling the second throttling device to open to a first opening degree, and / or controlling the first solenoid valve to open to a second opening degree; controlling the compressor to stop operating. The present invention reduces the noise generated by the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular, to an air conditioner, a mute control method thereof, and a computer-readable storage medium. Background Art

[0002] At present, people's requirements for the quality of life are gradually increasing, and the demand for the mute comfort of air-conditioning products is also becoming more and more obvious; at present, when some small multi-connected units are designed, in order to improve the mute comfort on the indoor side, in the heating mode, when the indoor unit reaches the set temperature and stops, the electronic expansion valve of the indoor unit will close to ensure noise reduction indoors. However, when reaching the set temperature and stopping, the pressure difference of about 2 Mpa, which is about 3 times that generated by the compressor, loses balance. The huge pressure difference is prone to generate pressure oscillation during the balancing process, and the pressure shock wave can cause abnormal actions of the closing valve type moving mechanism in the system, generating continuous noise and reducing the use experience of the air conditioner. Summary of the Invention

[0003] The main purpose of the present invention is to provide an air conditioner, a mute control method thereof, and a computer-readable storage medium, aiming to solve the problem of how to reduce the continuous noise generated by the air conditioner.

[0004] To achieve the above object, a mute control method for an air conditioner provided by the present invention, the air conditioner includes a compressor, a four-way valve, a first heat exchanger, a first throttling device, and a second heat exchanger; one channel of the four-way valve communicates with the exhaust port of the compressor and the first heat exchanger, and the other channel of the four-way valve communicates with the suction port of the compressor and the second heat exchanger. The first throttling device is arranged on the pipeline between the first heat exchanger and the second heat exchanger; the air conditioner further includes a third heat exchanger, the third heat exchanger is connected to the gas supplement port of the compressor for supplementing gas to the pipeline between the first heat exchanger and the second heat exchanger; the exhaust port is connected with a second throttling device, and there is a branch between the gas supplement port and the exhaust port, and a first solenoid valve is arranged on the branch; the mute control method for the air conditioner includes the following steps:

[0005] In response to the compressor stop signal, control the first throttling device to remain open;

[0006] Control the second throttling device to open to a first opening degree, and / or control the first solenoid valve to open to a second opening degree;

[0007] Control the compressor to stop running.

[0008] Optionally, the step of controlling the compressor to stop running includes:

[0009] Obtain the current operating frequency of the compressor and execute the compressor stop process;

[0010] Determine the first throttle device, as well as the first closing condition of the second throttle device and / or the first solenoid valve, according to the current operating frequency;

[0011] When the first closing condition is satisfied, close the first throttle device, as well as the second throttle device and / or the first solenoid valve.

[0012] Optionally, the step of determining the first closing condition of the first throttle device, as well as the second throttle device and / or the first solenoid valve, according to the current operating frequency includes:

[0013] If the current operating frequency is greater than the preset frequency, determine that the first closing condition is that the compressor operating frequency drops to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and it lasts for the first preset duration;

[0014] If the current operating frequency is less than or equal to the preset frequency, determine that the first closing condition is that the operating frequency of the compressor drops to the preset frequency.

[0015] Optionally, the preset frequency is determined by a preset frequency coefficient, the minimum operating frequency of the compressor, and the maximum operating frequency of the compressor, and the preset frequency coefficient corresponding to the refrigeration mode is greater than the preset frequency coefficient corresponding to the heating mode.

[0016] Optionally, the step of controlling the compressor to stop operating includes:

[0017] Obtain the current pressure difference between the gas replenishing port and the suction port of the compressor, and execute the compressor shutdown process;

[0018] Determine the first throttle device, as well as the second closing condition of the second throttle device and / or the first solenoid valve, according to the current pressure difference;

[0019] When the second closing condition is satisfied, close the first throttle device, as well as the second throttle device and / or the first solenoid valve.

[0020] Optionally, the step of determining the first throttle device, as well as the second closing condition of the second throttle device and / or the first solenoid valve, according to the current pressure difference includes:

[0021] If the current pressure difference is greater than the preset pressure threshold, determine that the second closing condition is that the compressor operating frequency drops to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and it lasts for the second preset duration;

[0022] If the current pressure difference is less than or equal to the preset pressure threshold, determine that the second closing condition is that the operating frequency of the compressor drops to the preset frequency.

[0023] Optionally, the step of determining the first throttling device, and the second closing condition of the second throttling device and / or the first solenoid valve according to the current pressure difference includes:

[0024] Determine the temperature difference between the indoor temperature and the outdoor temperature at which the air conditioner is located;

[0025] If the current pressure difference is greater than a preset pressure threshold and the temperature difference is greater than a preset temperature threshold, then determine that the second closing condition is that the operating frequency of the compressor is reduced to a preset frequency, and the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and maintain for a third preset duration.

[0026] Optionally, a second solenoid valve is provided at the air supplement port. After the step of controlling the first throttling device to remain open in response to the compressor stop signal, the method further includes:

[0027] If the second solenoid valve is in a powered-on state, then control the second solenoid valve to be in a powered-off state;

[0028] After the step of controlling the compressor to stop running, the method further includes:

[0029] After a fourth preset duration, control the first solenoid valve to close.

[0030] To achieve the above object, the present invention further provides an air conditioner, where the air conditioner includes a memory, a processor, and an air conditioner mute control program stored in the memory and executable on the processor. When the air conditioner mute control program is executed by the processor, each step of the above-described air conditioner mute control method is implemented.

[0031] To achieve the above object, the present invention further provides a computer-readable storage medium storing an air conditioner mute control program. When the air conditioner mute control program is executed by a processor, each step of the above-described air conditioner mute control method is implemented.

[0032] An air conditioner, a mute control method thereof, and a computer-readable storage medium provided by the present invention, when responding to a compressor stop signal, control a first throttling device to remain open; control a second throttling device to open to a first opening degree, and / or control a first solenoid valve to open to a second opening degree; control the compressor to stop running. By controlling the first throttling device, and the second throttling device and / or the first solenoid valve, when the compressor stops running, the refrigerant pressure in the air conditioner pipeline is adjusted, avoiding noise generated by the solenoid valve in the air conditioner, such as the first solenoid valve, being reversely lifted due to the pressure difference, and reducing the noise generated by the air conditioner. Description of the Drawings

[0033] Figure 1 The structural schematic diagram of the air conditioner according to an embodiment of the present invention;

[0034] Figure 2 The hardware structural schematic diagram of the air conditioner according to an embodiment of the present invention;

[0035] Figure 3 The flowchart of the first embodiment of the silent control method for the air conditioner of the present invention;

[0036] Figure 4 The refined flowchart of step S30 in the second embodiment of the silent control method for the air conditioner of the present invention;

[0037] Figure 5 The refined flowchart of step S30 in the third embodiment of the silent control method for the air conditioner of the present invention.

[0038] Label Name Label Name 100 Indoor unit 110 Reheater 120 Second heat exchanger 130 Fan 101 Electronic expansion valve 200 Outdoor unit 210 Compressor 220 Four-way valve 230 First heat exchanger 240 Third heat exchanger 250 Gas-liquid separator 260 Electric control refrigerant module 201 First solenoid valve 202 Second throttling device 203 Electronic expansion valve 204 Second solenoid valve 205 Third solenoid valve 206 Fourth solenoid valve 207 Pressure detection sensor 208 Pressure detection sensor

[0039] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The main solution of the embodiment of the present invention is: in response to the compressor stop signal, control the first throttling device to remain open; control the second throttling device to open to the first opening degree, and / or control the first solenoid valve to open to the second opening degree; control the compressor to stop running.

[0042] By controlling the first throttling device, and the second throttling device and / or the first solenoid valve, when the compressor stops running, the refrigerant pressure in the air conditioner pipeline is adjusted, so as to prevent the solenoid valve in the air conditioner from being reversely lifted due to the pressure difference, and reduce the noise generated by the air conditioner.

[0043] Refer to Figure 1 , Figure 1 The structural schematic diagram of the air conditioner of the present invention. The air conditioner includes a compressor 210, a four-way valve 220, a first heat exchanger 230, a first throttling device and a second heat exchanger 120; wherein, the first heat exchanger 230 is an outdoor heat exchanger, and the second heat exchanger 120 is an indoor heat exchanger. Optionally, the second heat exchanger 120 is one or at least two.

[0044] Among them, the indoor unit 100 includes a compressor 210, a four-way valve 220, a first heat exchanger 230, and a third heat exchanger 240. The outdoor unit 200 includes a second heat exchanger 120, a reheater 110, and a fan 130. Optionally, the outdoor unit 200 further includes an electronic refrigerant module 260. The air conditioner further includes a liquid side connection pipe 300, a gas side connection pipe 400, and a high and low pressure connection pipe 500.

[0045] Optionally, in the cooling mode, one passage of the four-way valve 220 connects the exhaust port of the compressor 210 to the first heat exchanger 230 and the reheater 110, and the other passage of the four-way valve 220 connects the suction port of the compressor 210 to the second heat exchanger 120. The first throttling device is arranged in the pipeline between the first heat exchanger 230 and the second heat exchanger 120; optionally, the first throttling device includes an electronic expansion valve 203 for adjusting the refrigerant flow rate on the side of the first heat exchanger 230, and an electronic expansion valve 101 for adjusting the refrigerant flow rate on the side of the second heat exchanger 120.

[0046] Optionally, in the cooling mode, the refrigerant flows out from the exhaust port of the compressor 210 and enters the four-way valve 220, then sequentially flows into the first heat exchanger 230 and the third heat exchanger 240, and respectively flows into the second heat exchanger 120 and the reheater 110 of the indoor unit 100 through the liquid side connection pipe 300. A part of the refrigerant flowing out of the second heat exchanger 120 and the reheater 110 enters the four-way valve 220 through the gas side connection pipe 400, and then the refrigerant returns to the compressor 210 after passing through the gas-liquid separator 250. A part of the refrigerant flowing out of the second heat exchanger 120 and the reheater 110 passes through the high and low pressure connection pipe 500, then through the branch where the fourth solenoid valve 206 is located, and then the refrigerant returns to the compressor 210 after passing through the gas-liquid separator 250.

[0047] Optionally, in the heating mode, one passage of the four-way valve 220 connects the exhaust port of the compressor 210 to the second heat exchanger 120 and the reheater 110, and the other passage of the four-way valve 220 connects the suction port of the compressor 210 to the first heat exchanger 230. The first throttling device is arranged in the pipeline between the first heat exchanger 230 and the second heat exchanger 120; optionally, the first throttling device includes an electronic expansion valve 203 for adjusting the refrigerant flow rate on the side of the first heat exchanger 230, and an electronic expansion valve 101 for adjusting the refrigerant flow rate on the side of the second heat exchanger 120.

[0048] Optionally, in the heating mode, the refrigerant flows out from the exhaust port of the compressor 210. After a part of the refrigerant enters the four-way valve 220, it flows into the second heat exchanger 120 and the reheater 110 of the indoor unit 100 respectively through the gas-side connecting pipe 400. The refrigerant flows out from the exhaust port of the compressor 210. A part of the refrigerant passes through the branch where the third solenoid valve 205 is located and flows into the second heat exchanger 120 and the reheater 110 of the indoor unit 100 respectively through the high-low pressure connecting pipe 500. The refrigerant passing through the second heat exchanger 120 and the reheater 110 flows into the third heat exchanger 240 and the first heat exchanger 230 in sequence through the liquid-side connecting pipe 300, and flows into the gas-liquid separator 250 through the four-way valve 230 and then returns to the compressor 210.

[0049] Optionally, a high-pressure detection sensor 208 is provided at the exhaust port of the compressor 210, a low-pressure detection sensor 207 is provided at the exhaust port of the compressor 210, and an injection enthalpy valve 204 is provided at the gas supplement port of the compressor 210.

[0050] The air conditioner further includes a third heat exchanger 240. Optionally, the third heat exchanger 240 is a plate heat exchanger. The third heat exchanger 240 is connected to the gas supplement port of the compressor 210 and is used to supplement gas to the pipeline between the first heat exchanger 230 and the second heat exchanger 120.

[0051] Optionally, a second throttling device 202 is connected to the exhaust port of the compressor 210, and a second throttling device 202 is provided in the branch between the exhaust port of the compressor 210 and the four-way valve 220. Optionally, the second throttling device 202 is an on-off valve, such as an electric ball valve. There is a branch between the gas supplement port and the exhaust port, and a first solenoid valve 201, i.e., a subcooling valve, is provided on the branch.

[0052] Optionally, there is a branch between the gas supplement port of the compressor and the suction port of the compressor, a first solenoid valve 201 is provided on the branch, and a second solenoid valve 204 is provided at the gas supplement port. Optionally, the second solenoid valve 204 is an injection enthalpy valve.

[0053] As an implementation solution, the air conditioner can be as Figure 2 shown.

[0054] The solution of the embodiment of the present invention relates to an air conditioner, which includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. Among them, the communication bus 103 is used to realize the connection and communication between these components.

[0055] The memory 102 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. As Figure 2As shown, the memory 102, which is a computer-readable storage medium, may include an air conditioner mute control program; and the processor 101 may be configured to call the air conditioner mute control program stored in the memory 102 and perform the following operations:

[0056] In response to a compressor stop signal, control the first throttling device to remain open;

[0057] Control the second throttling device to open to a first opening degree, and / or control the first solenoid valve to open to a second opening degree;

[0058] Control the compressor to stop running.

[0059] Based on the above hardware architecture of the air conditioner, an embodiment of the air conditioner mute control method of the present invention is proposed.

[0060] Referring to Figure 3 , Figure 3 This is the first embodiment of the air conditioner mute control method of the present invention. The air conditioner mute control method includes the following steps:

[0061] Step S10, in response to a compressor stop signal, control the first throttling device to remain open.

[0062] Optionally, in the heating mode or the cooling mode of the air conditioner, after detecting that the room temperature or the air outlet temperature of the air conditioner reaches the target temperature, trigger a compressor 210 stop signal;

[0063] Optionally, when receiving a stop instruction or a shutdown instruction of the air conditioner sent by the user through the remote control or the terminal device, trigger a compressor 210 stop signal. Among them, when the air conditioner receives a stop instruction, the air conditioner pauses operation, and when the air conditioner receives a shutdown instruction, the air conditioner shuts down.

[0064] When responding to the compressor 210 stop signal, the pressure difference of about 2 Mpa, which is about 3 times that generated by the compressor originally, loses maintenance. The huge pressure difference is likely to generate pressure oscillations during the balancing process, and the pressure shock wave can cause abnormal actions of the closing valve type moving mechanisms in the system, generating objectionable noise. Optionally, when responding to the compressor 210 stop signal, there is a branch between the air inlet and the air outlet of the compressor 210, and there is a large pressure difference on both sides of the first solenoid valve 201 provided on the branch. If the first solenoid valve 201 is directly closed, it will cause the first solenoid valve 201 to be pushed up reversely, resulting in noise in the air conditioner. Among them, as Figure 1As shown, during the heating operation, the side of the first solenoid valve 201 connected to the gas supplement port of the compressor 210 is at high pressure, and the side of the first solenoid valve 201 connected to the suction port of the compressor 210 is at low pressure; during the cooling operation, the side of the first solenoid valve 201 connected to the gas supplement port of the compressor 210 is at low pressure, and the side of the first solenoid valve 201 connected to the suction port of the compressor 210 is at high pressure.

[0065] Before responding to the compressor 210 stop operation signal, when the air conditioner is operating, the first throttling device is in the open state. Optionally, as Figure 1 shown, the first throttling device includes an electronic expansion valve 203 located on the side of the first heat exchanger 230, and electronic expansion valves 101 located on the sides of the second heat exchanger 120 and the reheater 110.

[0066] When responding to the compressor 210 stop operation signal, keep the first throttling device in the open state. Optionally, when the air conditioner is operating, the first throttling device is opened to the third opening degree, and when responding to the compressor 210 stop operation signal, the first throttling device is opened to the fourth opening degree. Optionally, the third opening degree is greater than the fourth opening degree.

[0067] Optionally, when responding to the compressor 210 stop operation signal, as Figure 1 shown, the fourth opening degrees of the electronic expansion valve 203 and the electronic expansion valve 101 in the first throttling device may be the same or different. Optionally, the fourth opening degree of the electronic expansion valve 203 is a1, and the fourth opening degree of the electronic expansion valve 101 is a2. Optionally, a1 is greater than a2.

[0068] Step S20, control the second throttling device to open to the first opening degree, and / or control the first solenoid valve to open to the second opening degree.

[0069] Optionally, as Figure 1 shown, a second throttling device 202 is connected to the exhaust port of the compressor 210, and a second throttling device 202 is provided on the branch between the exhaust port of the compressor 210 and the four-way valve 220. Optionally, the second throttling device 202 is an on-off valve, such as an electric ball valve. Among them, the second throttling device 202 can adjust the refrigerant flow rate passing through the pipeline and control the passing or non-passing of the refrigerant flow rate. A branch is provided between the gas supplement port and the exhaust port of the compressor 210, and a first solenoid valve 201, that is, a subcooling valve, is provided on the branch. Optionally, open the second throttling device 202 to the first opening degree, and / or open the first solenoid valve 201 to the second opening degree, so as to adjust the pressure of the refrigerant pipeline inside the air conditioner.

[0070] Optionally, when the first throttling device remains open and the second throttling device 202 is opened to the first opening degree, the compressor 210, the first heat exchanger 230, and the third heat exchanger 240 are communicated with the second heat exchanger 120 through the liquid-side connecting pipe 300, and the second heat exchanger 120 returns to the compressor 210 through the gas-side liquid pipe 400 to form a refrigerant circuit, so as to adjust the pressure of the refrigerant pipeline inside the air conditioner.

[0071] Optionally, when the first throttling device remains open and the first solenoid valve 201 is opened to the second opening degree, a refrigerant circuit is formed in the branch where the compressor 210 and the first solenoid valve 201 are located, and a refrigerant circuit is formed by the compressor 210, the third heat exchanger 240, the second heat exchanger 120, and the reheater 110, so as to adjust the pressure of the refrigerant pipeline inside the air conditioner.

[0072] Optionally, when the first throttling device remains open, the second throttling device 202 is opened to the first opening degree, and the first solenoid valve 201 is opened to the second opening degree, the compressor 210, the first heat exchanger 230, and the third heat exchanger 240 are communicated with the second heat exchanger 120 through the liquid-side connecting pipe 300, and the second heat exchanger 120 returns to the compressor 210 through the gas-side liquid pipe 400 to form a refrigerant circuit. A refrigerant circuit is formed in the branch where the compressor 210 and the first solenoid valve 201 are located, and a refrigerant circuit is formed by the compressor 210, the third heat exchanger 240, the second heat exchanger 120, and the reheater 110, so as to adjust the pressure of the refrigerant pipeline inside the air conditioner.

[0073] Step S30, control the compressor to stop running.

[0074] Optionally, after the first throttling device remains open and the second throttling device 202 and / or the first solenoid valve 201 are opened, control the compressor 210 to stop running to adjust the pressure of the refrigerant pipeline inside the air conditioner. It takes a certain period of time from the start of responding to the stop running signal to the stop of the compressor 210. Even after the compressor 210 stops running, there may still be a pressure difference on both sides of the first solenoid valve 201. Therefore, it is also necessary to determine the closing conditions of the first throttling device, the second throttling device 202, and / or the first solenoid valve 201. When the first throttling device, the second throttling device 202, and / or the first solenoid valve 201 meet the closing conditions, close the first throttling device, the second throttling device 202, and / or the first solenoid valve 201.

[0075] Optionally, a branch is provided between the gas supplement port and the gas return port of the compressor 210, a first solenoid valve 201 is provided on the branch, and a second solenoid valve 204 is provided at the gas supplement port. Optionally, the second solenoid valve 204 is an injection enthalpy solenoid valve. When responding to the signal that the compressor 210 stops running, keep the first throttling device in the open state. If the second solenoid valve 204 is in the powered-on state, control the second solenoid valve 204 to be powered off, open the second throttling device 202 to the first opening degree, and / or open the first solenoid valve 201 to the second opening degree. Control the compressor 210 to stop running, that is, execute the stop process of the compressor 210; after the fourth preset time period, control the first solenoid valve 201 to close. Optionally, when the first closing condition or the second closing condition is satisfied, close the first throttling device, and the second throttling device 202 and / or the first solenoid valve.

[0076] Optionally, during the heating or cooling operation of the air conditioner, due to the pressure difference across the first solenoid valve 201, to prevent the first solenoid valve 201 from being lifted up and generating noise, control the first solenoid valve 201 to open to the third opening degree.

[0077] In the technical solution of this embodiment, when responding to the signal that the compressor 210 stops running, control the first throttling device to remain in the open state; control the second throttling device 202 to open to the first opening degree, and / or control the first solenoid valve 201 to open to the second opening degree; control the compressor 210 to stop running. By controlling the first throttling device, and the second throttling device 202 and / or the first solenoid valve, when the compressor 210 stops running, the refrigerant pressure in the air conditioner pipeline is adjusted, avoiding the noise generated by the reverse lifting of the solenoid valve in the air conditioner, such as the first solenoid valve 201, due to the pressure difference, and reducing the noise generated by the air conditioner.

[0078] Refer to Figure 4 , Figure 4 This is the second embodiment of the air conditioner mute control method of the present invention. Based on the first embodiment, the step S30 includes:

[0079] Step S31, obtain the current operating frequency of the compressor and execute the compressor stop process;

[0080] Step S32, determine the first closing condition of the first throttling device, and the second throttling device and / or the first solenoid valve according to the current operating frequency;

[0081] Step S33, when the first closing condition is satisfied, close the first throttling device, and the second throttling device and / or the first solenoid valve.

[0082] Optionally, after opening the second throttling device 202 and / or the first solenoid valve, obtain the current operating frequency of the compressor 210 and execute the stop process of the compressor 210.

[0083] Optionally, the current operating frequency is the operating frequency of the compressor 210 before the process of stopping the compressor 210 is executed.

[0084] Optionally, if the current operating frequency is greater than the preset frequency, it is determined that the first shutdown condition is that the operating frequency of the compressor 210 is reduced to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor 210 is less than the preset pressure threshold, and it is maintained for the first preset duration; optionally, refrigerant pressure detection sensors are provided at both the exhaust port and the suction port of the compressor 210. Optionally, the value range of the first preset duration is 0.5 to 5 min, and the recommended value is 1 min.

[0085] Optionally, the preset frequency is determined by a preset frequency coefficient, the minimum operating frequency of the compressor 210, and the maximum operating frequency of the compressor 210, and the preset frequency coefficient corresponding to the cooling mode is greater than the preset frequency coefficient corresponding to the heating mode.

[0086] Optionally, before the process of stopping the compressor 210 is executed, when the outdoor unit is in the cooling mode, the current operating frequency Fr > k1*(Fmin + Fmax), where k1 is the cooling frequency coefficient, and the value range of the cooling frequency coefficient is 0.25 to 0.45, and the recommended value is 0.3; Fmin represents the minimum operating frequency allowed for the compressor 210, and Fmax represents the maximum operating frequency allowed for the compressor 210. Execute the process of stopping the compressor 210, and control the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 to remain in the open state. Optionally, when the frequency Fr of the compressor 210 = 0, and the duration a when Ph = Pl is satisfied, the first shutdown condition is met, then the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed. Wherein, Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210. Optionally, the duration a, that is, the value range of the first preset duration is 0.5 to 5 min, and the recommended value is 1 min.

[0087] Optionally, before the compressor 210 stop process is executed, when the outdoor unit is in the heating mode, the current operating frequency Fr > k2 * (Fmin + Fmax), where k2 is the refrigeration frequency coefficient, and the value range of the refrigeration frequency coefficient is 0.15 to 0.30, and the recommended value is 0.25; Fmin represents the minimum allowable operating frequency of the compressor 210, and Fmax represents the maximum allowable operating frequency of the compressor 210. Execute the compressor 210 stop process, and control the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 to remain open. Optionally, when the compressor 210 frequency Fr = 0 and the duration b for which Ph = Pl is maintained is satisfied, the first closing condition is met, then the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed. Wherein, Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210. Optionally, the value range of the duration a is 10 to 120 s, and the recommended value is 30 s.

[0088] Optionally, if the current operating frequency is less than or equal to the preset frequency, it is determined that the first closing condition is that the operating frequency of the compressor 210 is reduced to the preset frequency.

[0089] Optionally, before the compressor 210 stop process is executed, when the outdoor unit is in the cooling mode, the current operating frequency Fr ≤ k1 * (Fmin + Fmax), where k1 is the refrigeration frequency coefficient, and the value range of the refrigeration frequency coefficient is 0.25 to 0.45, and the recommended value is 0.3; Fmin represents the minimum allowable operating frequency of the compressor 210, and Fmax represents the maximum allowable operating frequency of the compressor 210. Execute the compressor 210 stop process, and control the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 to remain open. Optionally, when the compressor 210 frequency Fr = 0, the first closing condition is met, then the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed.

[0090] Optionally, before the compressor 210 stops, when the outdoor unit is in the heating mode, the current operating frequency Fr ≤ k2 * (Fmin + Fmax), where k2 is the refrigeration frequency coefficient, and the value range of the refrigeration frequency coefficient is 0.15 to 0.30, and the recommended value is 0.25; Fmin represents the minimum allowable operating frequency of the compressor 210, and Fmax represents the maximum allowable operating frequency of the compressor 210. When the compressor 210 stop process is executed, the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are all kept open. Optionally, when the frequency Fr of the compressor 210 = 0, that is, the first closing condition is satisfied, the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed. Wherein, Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210. Optionally, the value range of the duration a is 10 to 120 s, and the recommended value is 30 s.

[0091] In the technical solution of this embodiment, by determining the first closing condition, when the first closing condition is satisfied, the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed, so that when the compressor 210 stops running, the refrigerant pressure in the air conditioner pipeline is adjusted, avoiding the reverse lifting of the solenoid valve in the air conditioner due to the pressure difference, and reducing the noise generated by the air conditioner.

[0092] Refer to Figure 5 , Figure 5 This is the third embodiment of the air conditioner mute control method of the present invention. Based on the first or second embodiment, the step S30 includes:

[0093] Step S34, obtaining the current pressure difference between the air supplement port and the suction port of the compressor, and executing the compressor shutdown process;

[0094] Step S35, determining the second closing condition of the first throttling device, and the second throttling device and / or the first solenoid valve according to the current pressure difference;

[0095] Step S36, when the second closing condition is satisfied, closing the first throttling device, and the second throttling device and / or the first solenoid valve.

[0096] Optionally, after the second throttling device 202 and the first solenoid valve 201 are opened, obtain the current pressure difference between the air supplement port and the suction port of the compressor 210, and execute the compressor 210 shutdown process;

[0097] Optionally, the current pressure difference is the current pressure difference between the air supplement port and the suction port of the compressor 210 before the compressor 210 stop process is executed.

[0098] Optionally, if the current pressure difference is greater than the preset pressure threshold, it is determined that the second closing condition is that the operating frequency of the compressor 210 is reduced to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor 210 is less than the preset pressure threshold, and the second preset duration is maintained.

[0099] Optionally, before the compressor 210 stop process is executed, when the outdoor unit is in the cooling mode, the current pressure difference Ph - Pl > ΔP1, where Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210, and ΔP1 represents the preset pressure threshold, and the value range of ΔP1 is 0.5 to 0.65 Mpa, and the recommended value is 0.6 Mpa. The compressor 210 stop process is executed, and the first throttling device, the second throttling device 202 and / or the first solenoid valve 201 are all controlled to remain in the open state. When the frequency Fr of the compressor 210 = 0, and Ph = Pl, and the maintenance time a satisfies the second closing condition, the first throttling device, the second throttling device 202 and / or the first solenoid valve 201 are closed. Optionally, the duration a, that is, the value range of the second preset duration is 0.5 to 5 min, and the recommended value is 1 min.

[0100] Optionally, before the compressor 210 stop process is executed, when the outdoor unit is in the heating mode, the current pressure difference Ph - Pl > ΔP2, where Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210, and ΔP1 represents the preset pressure threshold, and the value range of ΔP1 is 0.2 to 0.45 Mpa, and the recommended value is 0.3 Mpa. The compressor 210 stop process is executed, and the first throttling device, the second throttling device 202 and / or the first solenoid valve 201 are all controlled to remain in the open state. When the frequency Fr of the compressor 210 = 0, and Ph = Pl, and the maintenance time b satisfies the second closing condition, the first throttling device, the second throttling device 202 and / or the first solenoid valve 201 are closed. Optionally, the duration b, that is, the value range of the second preset duration is 0.5 to 5 min, and the recommended value is 1 min.

[0101] If the current pressure difference is less than or equal to the preset pressure threshold, it is determined that the second closing condition is that the operating frequency of the compressor 210 is reduced to the preset frequency.

[0102] Optionally, before the compressor 210 stopping process is executed, when the outdoor unit is in the cooling mode, the current pressure difference Ph - Pl ≤ ΔP1, where Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210, and ΔP1 represents a preset pressure threshold, and the value range of ΔP1 is 0.5 to 0.65 Mpa, and the recommended value is 0.6 Mpa. Execute the compressor 210 stopping process, and control the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 to remain in the open state. When the compressor 210 frequency Fr = 0, the second closing condition is satisfied, then the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed.

[0103] Optionally, before the compressor 210 stopping process is executed, when the outdoor unit is in the heating mode, the current pressure difference Ph - Pl ≤ ΔP2, where Ph represents the pressure value detected by the pressure detection sensor 208 at the exhaust port of the compressor 210; Pl represents the pressure value detected by the pressure detection sensor 207 at the suction port of the compressor 210, and ΔP1 represents a preset pressure threshold, and the value range of ΔP1 is 0.2 to 0.45 Mpa, and the recommended value is 0.3 Mpa. Execute the compressor 210 stopping process, and control the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 to remain in the open state. When the compressor 210 frequency Fr = 0, the second closing condition is satisfied, then the first throttling device, and the second throttling device 202 and / or the first solenoid valve 201 are closed.

[0104] Optionally, the preset pressure threshold in the cooling mode is greater than the preset pressure threshold in the heating mode.

[0105] Optionally, determine the temperature difference between the indoor temperature and the outdoor temperature of the air conditioner; if the current pressure difference is greater than the preset pressure threshold, and the temperature difference is greater than the preset temperature threshold, then determine that the second closing condition is that the operating frequency of the compressor 210 is reduced to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor 210 is less than the preset pressure threshold, and it is maintained for a third preset duration.

[0106] Optionally, if the current pressure difference is greater than the preset pressure threshold, and the temperature difference is less than or equal to the preset temperature threshold, then determine that the second closing condition is that the operating frequency of the compressor 210 is reduced to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor 210 is less than the preset pressure threshold, and it is maintained for a fifth preset duration. Optionally, the fifth preset duration is less than the third preset duration.

[0107] Optionally, if the current pressure difference is less than or equal to a preset pressure threshold and the temperature difference is greater than a preset temperature threshold, determine that the second shutdown condition is that the operating frequency of the compressor 210 is reduced to a preset first frequency.

[0108] Optionally, if the current pressure difference is less than or equal to a preset pressure threshold and the temperature difference is less than or equal to a preset temperature threshold, determine that the second shutdown condition is that the operating frequency of the compressor 210 is reduced to a preset second frequency. Optionally, the preset first frequency is less than the preset second frequency.

[0109] In the technical solution of this embodiment, by determining the second shutdown condition, when the second shutdown condition is satisfied, the first throttling device, the second throttling device 202 and / or the first solenoid valve 201 are closed, so that when the compressor 210 stops operating, the refrigerant pressure in the air conditioner pipeline is adjusted, avoiding the reverse lifting of the solenoid valve in the air conditioner due to the pressure difference and reducing the noise generated by the air conditioner.

[0110] The present invention also provides an air conditioner, which includes a memory, a processor, and an air conditioner mute control program stored in the memory and executable on the processor. When the air conditioner mute control program is executed by the processor, it implements each step of the air conditioner mute control method as described in the above embodiment.

[0111] The present invention also provides a computer-readable storage medium, which stores an air conditioner mute control program. When the air conditioner mute control program is executed by a processor, it implements each step of the air conditioner mute control method as described in the above embodiment.

[0112] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0113] It should be noted that in this article, the terms "include", "comprise" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, system, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, system, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, system, article or device including that element.

[0114] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment system can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium as described above (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which may be a mobile phone, a computer, a parking management device, an air conditioner, or a network device, etc.) to execute the system described in various embodiments of the present invention.

[0115] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for controlling the silence of an air conditioner, characterized in that, The air conditioner includes a compressor, a four-way valve, a first heat exchanger, a first throttling device, and a second heat exchanger; one passage of the four-way valve communicates with the exhaust port of the compressor and the first heat exchanger, and the other passage of the four-way valve communicates with the suction port of the compressor and the second heat exchanger. The first throttling device is arranged on the pipeline between the first heat exchanger and the second heat exchanger. The air conditioner further includes a third heat exchanger, which is connected to the gas supply port of the compressor and is used to supply gas to the pipeline between the first heat exchanger and the second heat exchanger. The exhaust port is connected with a second throttling device, and there is a branch between the gas supply port and the suction port, and a first solenoid valve is arranged on the branch. The air conditioner mute control method includes: In response to the compressor stop signal, control the first throttling device to remain open. Control the second throttling device to open to a first opening degree, and control the first solenoid valve to open to a second opening degree. Control the compressor to stop running; wherein, obtain the current operating frequency of the compressor, and execute the compressor stop process. If the current operating frequency is greater than the preset frequency, then determine that the first closing condition is that the compressor operating frequency decreases to the preset compressor frequency, the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and it is maintained for a first preset time. If the current operating frequency is less than or equal to the preset frequency, then determine that the first closing condition is that the operating frequency of the compressor decreases to the preset compressor frequency. When the first closing condition is met, close the first throttling device, as well as the second throttling device and the first solenoid valve.

2. The air conditioner mute control method according to claim 1, characterized in that, The preset frequency is determined by a preset frequency coefficient, the minimum operating frequency of the compressor, and the maximum operating frequency of the compressor. The preset frequency coefficient corresponding to the cooling mode is greater than the preset frequency coefficient corresponding to the heating mode.

3. The air conditioner mute control method according to claim 1, characterized in that The step of controlling the compressor to stop running includes: Obtain the current pressure difference between the gas supply port and the suction port of the compressor, and execute the compressor shutdown process. Determine the second closing conditions of the first throttling device, as well as the second throttling device and the first solenoid valve according to the current pressure difference. When the second closing condition is met, close the first throttling device, as well as the second throttling device and the first solenoid valve.

4. The air conditioner mute control method according to claim 3, wherein, The step of determining the second closing conditions of the first throttling device, as well as the second throttling device and the first solenoid valve according to the current pressure difference includes: If the current pressure difference is greater than the preset pressure threshold, then determine that the second closing condition is that the compressor operating frequency decreases to the preset frequency, the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and it is maintained for a second preset time. If the current pressure difference is less than or equal to the preset pressure threshold, then determine that the second closing condition is that the operating frequency of the compressor decreases to the preset frequency.

5. The air conditioner mute control method according to claim 3, characterized in that, The step of determining the second closing conditions of the first throttling device, as well as the second throttling device and the first solenoid valve according to the current pressure difference includes: Determine the temperature difference between the indoor temperature and the outdoor temperature at which the air conditioner is located. If the current pressure difference is greater than a preset pressure threshold and the temperature difference is greater than a preset temperature threshold, then determine that the second shutdown condition is that the operating frequency of the compressor is reduced to a preset frequency, the pressure difference between the exhaust port and the suction port of the compressor is less than the preset pressure threshold, and this state is maintained for a third preset duration.

6. The air conditioner mute control method according to claim 1, characterized in that, A second solenoid valve is provided at the gas supplement port. After the step of controlling the first throttling device to remain open in response to a compressor stop signal, the method further includes: If the second solenoid valve is in the powered-on state, then control the second solenoid valve to be in the powered-off state; After the step of controlling the compressor to stop running, the method further includes: After a fourth preset duration, control the first solenoid valve to close.

7. An air conditioner, characterized in that, The air conditioner includes a memory, a processor, and an air conditioner mute control program stored in the memory and executable on the processor. When the air conditioner mute control program is executed by the processor, it implements each step of the air conditioner mute control method according to any one of claims 1-6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an air conditioner mute control program. When the air conditioner mute control program is executed by a processor, it implements each step of the air conditioner mute control method according to any one of claims 1-6.

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